package org.example.jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;


public class JDBCLogin2 {
    public static void main(String[] args) {
        try (Connection connection = DBUtil.getConnection();) {
            Scanner scanner = new Scanner(System.in);
            System.out.println("请输入用户名：");
            String username = scanner.nextLine();
            System.out.println("请输入密码");
            String password = scanner.nextLine();
            //1.创建预编译SQL的执行对象；
            String sql = "SELECT nickname FROM user WHERE username=? AND password=?";
            PreparedStatement ps = connection.prepareStatement(sql);
            //2.设置占位符？的值
            ps.setString(1, username);
            ps.setString(2, password);
            //3.执行SQL语句
            ResultSet rs = ps.executeQuery();
            if (rs.next()) {
                String nickname = rs.getString("nickname");
                System.out.println("恭喜你"+nickname+"登录成功！");
            } else {
                System.out.println("错误");
            }
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
    }
}
